#include <iostream>
#include <stdio.h>

void xx(int id, int count, std::pair<int, int> items = {0, 0}) {
    printf("id: %d count:%d\n", id, count);
    printf("%d %d\n", items.first,items.second);
}

int main(void)
{
    std::pair<int *, int> test;
    printf("%d -- %d\n", test.first == nullptr, test.second);
    std::pair<int, int> tt = {1,2};
    printf("%d %d\n", tt.first, tt.second);
    xx(1,1);
    return 0;
}
